Yes the 1970s and early 80s were good times for rape scene material, some more graphic than others, but even some of the not-so-graphic stuff was pretty good, as it put your imagination to work as to what really happened that didn't get shown.

I seem to remember in the mid-1980s, there was a pilot for a TV cop show. I can't remember the name of the show and it didn't run for that long. Didn't make a full season anyway. But in the pilot, the cops were trying to track down a serial rapist who was terrorizing young college women. There was one really good scene where a woman is tied up and raped in the backseat of a car. It showed him slicing her clothes off with a knife. Even though, of course, it showed no nudity, after all it WAS primetime TV, it was still one of the most graphic scenes I'd ever seen on a TV show.